Response variable
A response variable is the outcome you measure to see how it changes with the explanatory variable; it goes on the y-axis of a scatterplot.
The response variable, also called the dependent variable, is the outcome you expect to depend on the explanatory variable. It sits on the vertical axis and supplies the values in a regression, so the fitted line predicts it. For example, when studying how study time affects test scores, the test score is the response variable. A regression line estimates the mean response for each value of the explanatory variable.
More variables and data types terms, or browse the full statistics glossary.